The only way to learn mathematics is to do mathematics.

"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

对艺术最好的批评是更多的艺术。

Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

我们就是我们一再重复的行为。因此，卓越不是一种行为，而是一种习惯。